$bubble-color: #FFCC33;

.bubble {
  position: relative;
  background-color:$bubble-color;
  margin: 30px 2px 30px 2px;
  padding:10px;
  text-align:center;
  width:400px;
  @include border-radius(10px);
}
.bubble:after {
  position: absolute;
  display: block;
  content: "";
  border-color: transparent transparent $bubble-color transparent;
  border-style: solid;
  border-width: 10px;
  height:0;
  width:0;
  position:absolute;
  top:-19px;
  left:1em;
}